Probably Hypnogogic hallucination, which is a normal and common transitional phase between wakefulness and sleep characterized by vivid hallucinations incorporating any or all senses.

I have this too. Music, people, simulated falling, stuff like that right before I fall asleep. I always thought this was common?

Exploding Head Syndrome maybe? https://en.wikipedia.org/wiki/Exploding_head_syndrome

.. I think so? Never questioned it honestly, guess I'll have to do some research now haha

edit: this website says they're fiiiiine, although the auditory ones are rarer than visual and somatic ones. Somewhat related to Narcolepsy though, so I guess that's another thing to mention when I get evaluated for that haha (getting on adhd meds somewhat fixed my daytime eepyness so I've been procrastinating on getting it checked out)

Or is it that auditory hallucinations are strongly associated (not clinically, just the way they are always talked about) with bad mental health problems like schizophrenia, which makes them taboo, so people choose not to talk about them, even to doctors?

I get auditory, gustatory, and olfactory hallucinations all the time, due to chronic headache and migraines. Wish I got visual ones too, just for the variety, but alas. I hate peanut butter so so much (my most common hallucination is the smell or taste of peanut butter). My auditory hallucinations aren’t usually voices talking, though, they tend to be cats meowing or chickens yelling, because that’s what I hear most frequently in my daily life, so that’s what I’m trained to listen for.

The only thing I’d classify as that is "feeling" like I hear far-away inaudible voices.